Unit panel removable floor form for joist construction



March 5, 1935. F, JARBOE 1,993,008

UNIT PANEL REMOVABLE FLOOR FORM FOR JOIST CONSTRUCTION Filed Feb. 16, 1952 2 Sheets-Sheet l m 0) U) h "1, w \\Q\ Q R 0 m g *0 02* (D Q w R 1 5 1 N I l x \D R M Q inventor k) $1 N E9522 tf4/650f (Ittorneg F. JARBOE March 5, 1935.

UNIT PANEL REMOVABLE FLOOR FORM FOR JOIST'CONSTRUCTION Filed Feb. 16, 1932 2 Sheets-Sheet, 2

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I i n n m Bra Zmventor 72m) 2/4/9505 Ottorneg Patented Mar. 5, 1935 UNITED STATES UNIT PANEL REMOVABLE FLOOR FORM FOR JOIST CONSTRUCTION Fred Jarboe, San Diego, Calif. Application February 16, 1932, Serial No. 593,274

2 Claims.

My invention relates to unit panel removable floor form for joist construction, and the objects of my invention are:

First, to provide a form of this class which.

is particularly adapted for the construction of concrete floors and ceilings;

Second, to provide a form of this class which eliminates the need of false ceilings inasmuch as the joist of the floor above may also be rendered ornamental thus reducing to a minimum the weight of the floor or ceiling constructed thereby.

Third, to provide a form of this class which may be readily and quickly constructed to meet the particular dimensions or architectural treatment of building in the construction of which the form is used;

Fourth, to provide a form of this class which may be removed without disturbing the temporary bracing, shoring or stringers used to support the form while the concrete is being poured, thus the form may be removed while the concrete is.

ble of being used repeatedly and which will not readily deteriorate or get out of order.

With these and other objects in view as will appear hereinafter, my invention consists of certain novel features of construction, combination and arrangement of parts and portions as will be hereinafter described in detail and particularly set forth in the appended claims, reference being had to the accompanying drawings and to the characters of reference thereon which form a part of this application, in which:

Figure 1 is a fragmentary perspective view showing my novel floor form in position after the concrete has been poured, and also showing the manner in which temporary bracing may be used in conjunction therewith; Fig. 2 is a fragmentary plan view of my floor form as it appears when positioned but before concrete has been poured; Fig. 3 is a fragmentary view of one corner portion of a floor form unit in which a fresco or ornament forming member is incorporated; and Fig. 4 is a transverse sectional view of said unit taken substantially through 4-4 of Fig. 3.

Similar characters of reference refer to similar parts and portionsthroughout the several views of the drawings. I

i J oist bottom members 1 and 2, form side members 3 and'4, top piece 5,;top plate 6,,c1eat 7, brace 8, cross members 9, cleats 10, and fresco forming member, 11, constitute the principal parts and portions of my novel floor form.

Before positioning my novel floor form, con-' ventional side wall forms A are positioned and shoring B, stringers C, and centering means or ledgers D are positioned, as shown in Fig. l. The various elements of my novel floor form are then in positionv so as to be supported by the frame' work comprising the forementioned members.

Joist bottom members 1 are positioned along each ledger D. These members are in the form of fiat strips with beveled side portions, indicated by la. Thejoist bottom members are positioned with their wider sides uppermost. These sides are somewhat wider than the ledgers upon which the bottom members rest. Wherever cross beams are to be provided, other joist bottom, members 2 are placed, these members extending transversely with respect to theledgers and are supported by any suitable. means. The joist members 2 are provided withbeveled side portions 2a similar to the beveled side portions 1a of the joist bottom members 1. 1 The joist bottom members land 2when positioned delineate a plurality of rectangular or square areas which form the panels or units of the floor orfloor and ceiling, orroof and ceiling, 'as the case may be. One unit of my novel removable floor form is used in the construction of each of these panels. Each floor form unit comprises side members 3 and end members 4. The outer sides of these members slope inwardly slightly,

as indicated by 3a and 4a, respectively, so as to provide sufiicient draft to permit easy removal of the form unit.

The upper side of the rectangular frame formed by two pair of side members is closed by a top piece 5. The top piece 5 is set within the 1 side members so that its upper surface is sub-.

The top piece 5 is held in place by adjacent the under side of the top piece 5. In addition cross members 9 are provided at intervals. These members are disposed underneath the brace 8 and extend between the side members 3.

Each form unit is constructed so as to fit snugly within the rectangular space provided by two pair of joist bottom members 1 and 2 when the lower margins, designated 3b and 4b, of the form side members slightly overlap the beveled sides of the joist bottom members, as shown best in Fig. 1, forming tool receiving spaces F. Each form unit is held in place by cleats 10 temporarily secured to the sides of the lodgers-D. I

After the several form units are positioned and the reinforcing has been arranged, the concrete E is poured so as to cover the several form units,

thereby forming floor portions E1, joist or girder portions E2, or the like. After the concrete has set sufliciently the cleats 10 are removed, whereupon the claw of a hammeror crowbar or any other suitable tool is inserted in the space F provided between the bevelledsides 1a of the joist bottom members 1 and-the lowermargins 3b of the form side members 3 soas to'pry theside members downward. By reason of the bevel or taper of the form unit and particularly the greater bevel of the sides of the joist bottom forming members, only a 'slightdownward movementof the panel unit is required in order to break the seal with the concrete'and loosen the panel or form unit and'permit its removal as a whole. Hence, the form unit is ready for further use without re-assembling.

It will be noted that the'joist-bottom members 1 and 2 remain in place after the form-unit is removed. This enables the form unit to be removed while the concrete is still greenas very little stress or strain is placed thereon as long as the joists are supported. After the concrete has set a sufiicient time the shoring B, stringers C, ledgers D, andform'bottom members are removed.

If it'is desired to provide-ornamentation in thevarious panels, this may be easily accomplished by suitable fresco casting members 11 positioned'on .top of the various top plates 6, as shown in Figs. 3 and 4'. "In this manner a base relief design of :practically any motif -may be formed. 7 I v It will be noted that the particular construction illustrated readily permits the various eletion and arrangement, but desire to include in the scope of my invention the construction, combination and arrangement substantially as set forth in the appended claims.

, Having thus described my invention, what I claim as new and desire to secure by Letters Patent'is:

1. In a form of the class described, a plurality of joist bottom forming members disposed so as to delineate a plurality of polygonal areas, said members being beveled along their sides and arranged with their wider surfaces uppermost, and rigid panel forms arranged to conform to and fit within said polygonal areas, themargins of said panel forms overlapping the beveled sides of said'joist bottom forming members, and forming therewith prying tool receiving spaces.

2. A form for concrete ceilings comprising, a plurality of joist bottom forming members disposed so as to delineate a plurality of polygonal areas, said members being beveled along their edges and arranged with theirwider surfaces uppermost, a plurality of beams extending along said joist bottom forming members, and shoring for supporting the beams and saidjoist bottom forming members, a plurality of panels shaped to conform to the polygonal areas includingdownwardly diverging side walls engaging the edges of said joist bottom forming members, the divergence of the-side walls being less than the bevel of said joist bottom forming members, whereby said side walls engage the upper edge corners only of the joist bottom forming members to form pry tool receiving spaces therebelow, and V temporary supporting means for said panels attached to the beams and engaging the lower edges of said side walls, said panels being removable in toto uponremoval of said supportingimeans without distributing the joist bottom forming members, their beams or shoring.

' FRED JARBOE. 

